Force & Motion
Force
Push or pull
Vector
direction
magnitude
Newton's Law of Motion
1st Law
An object at rest will stay at rest,
an object in motion will stay in
motion at constant velocity,
unless acted upon by unbalanced force.
Inertia
2nd Law
3rd Law
Types of Force
Free body diagram
Tension
FT
Inclines
Friction
Kinetic friction
Act on the opposite direction of the object's velocity
it depends on : 1. normal force between two surface. 2. the nature of two sliding surface (coefficient of static friction)
Static friction
Applies when two surfaces are at rest with respect to each other (such as a book sitting on a table)
Application
Push or pull
The skier
Unbalanced force on a body.
(causes acceleration)
F=ma
Every action has an equal
and opposite reaction.
They act on different objects
They are equal in magnitude
They are opposite in direction
They are forces of the same type
Eg: Rocket launch
Forces acted on an object, all the forces can be added and represented as a single force, net force – resultant force.
Weight - force of gravity acting on object.
Drag -
'frictional force'
between
object and air
Upthrust - upwards force for
object placed in fluid.
Present when two solid
surfaces slide along each other.
Tension-
force in a rope
or string when
it is stretched.
Friction - force when two surfaces
rub over one another.
